EP0175992B1 - Process for the manufacture of a support for the brushes of a commutator machine - Google Patents

Process for the manufacture of a support for the brushes of a commutator machine Download PDF

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Publication number
EP0175992B1
EP0175992B1 EP85111381A EP85111381A EP0175992B1 EP 0175992 B1 EP0175992 B1 EP 0175992B1 EP 85111381 A EP85111381 A EP 85111381A EP 85111381 A EP85111381 A EP 85111381A EP 0175992 B1 EP0175992 B1 EP 0175992B1
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EP
European Patent Office
Prior art keywords
plug
pieces
plastic framework
plastic
connections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85111381A
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German (de)
French (fr)
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EP0175992A1 (en
Inventor
Oswald Wustmann
Rolf Rohloff
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0175992A1 publication Critical patent/EP0175992A1/en
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Publication of EP0175992B1 publication Critical patent/EP0175992B1/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/148—Slidably supported brushes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/40—Brush holders enabling brush movement within holder during current collection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches

Definitions

  • the invention relates to a method for producing a brush holder for a commutator machine according to the preamble of claim 1; such a method is known from DE-A-2 709 520.
  • both brush boxes are received by a single metal plate which has a hole in the middle between the opposing brush boxes, through which the machine shaft or the commutator is inserted or inserted at a radial distance becomes.
  • an insulating plastic cover plate is placed on each of the separating webs, which has holes through which the separating webs can be severed from the outside. Further electrical components can be plugged or soldered onto a plurality of connection points distributed over the single metal plate.
  • CH-A-568 679 For an electric motor with an electronic circuit for load-independent regulation of the speed, it is also known (CH-A-568 679) to fasten a permanent magnet having at least two magnetic poles to the detection of the respective speed as a signal transmitter on the one shaft end of the motor and to the To provide a coil with at least two pole pieces axially overlapping the permanent magnets and penetrating the coil on a circuit board held there on the motor stator on the opposite side of the shaft end.
  • a compact brush holder which can be produced with little effort is to be created, which can be connected electrically in a simple manner and can be equipped with further electrical components.
  • the holder according to the invention for the brushes of a commutator machine permits the positioning and contacting of the relevant brush system functional elements in the smallest space and with only a few manufacturing and simple assembly steps, the plastic frame being able to hold further functional elements, e.g. can be used for a scanning element of the rotor speed if, according to one embodiment of the invention, a scanning element that can be influenced by a magnetic ring in a contactless manner depending on the speed, e.g.
  • the bag in the form of a Hall converter, is held in a pocket of the plastic frame at a small radial distance from the magnetic ring; the bag is expediently arranged between the two connecting arms in a frame part of the plastic frame, which at the same time receives further plug connections, on which outer connecting lines for connecting the sensing element with a speed control circuit are possible, which in turn is then connected to the plug connections of the brushes.
  • auxiliary webs can be removed in a particularly simple manner after the plastic injection molding compound has hardened in that the removable auxiliary webs are arranged outside the plastic frame.
  • axially extending mounting pins for attaching the plastic frame to the inside of a bearing plate of the commutator machine or axial mounting pins for axially attaching a respective brush pressure spring for the brushes are also injection molded onto the plastic frame.
  • FIG. 1 shows a perspective top view of the inside of the commutator-side bearing plate 1 of a commutator motor shown in FIG. 2 in an axial partial longitudinal sectional view.
  • the rotor of the commutator motor shown in FIG. 2 carries on its right shaft end in front of the winding head 2 and the commutator 3 a magnetic ring 23 injected in plastic.
  • the axial region of the commutator 3 and the magnetic ring 23 is shaped like a part of a circle by a brush holder in accordance with FIG of a plastic frame 4 with various functional elements injected or molded therein partially without contact.
  • 3 and 4 show a one-piece stamped metal part; this metal part consists of two metal component units, each of which is a brush box base body 5 or 8 of a box brush holder, a plug connection 7 or 10 for the Connection of an outer connecting line and a connecting arm 6 or 9 which mechanically and electrically connects the plug connection 7 or 10 to the base body 5 or 8.
  • the two metal component units 5, 6, 7 and 8, 9, 10 are connected to one another via these mutually positioning, separable auxiliary webs 21, so that the two component units that are not directly electrically contacted during operation are already punched out integrally in their operational assignment, but after the subsequent injection into the plastic frame 4, which can be seen in FIG. 5, among other things, are electrically separated again by separating the auxiliary webs 21.
  • plug connections 11, 12, 13 are also punched out in the sense of a plug unit that can be contacted by a central plug, and are prepositioned with respect to one another in terms of their operational assignment by auxiliary webs 21 that can later be removed after the plastic embedding.
  • auxiliary webs 21 that can later be removed after the plastic embedding.
  • At the upper ends of the further plug connections 11, 12, 13, connecting webs 14, 15, 16 are provided for a further component held by the plastic frame 4, for which, in the present exemplary embodiment, a scanning element in the form of a Fig.
  • 11 drawn Hall converter 22 is provided in which when the rotor of the commutator motor is rotated by the magnetic ring 23 contact-free speed-proportional signals are generated, which are connected to the further plug connections 11, 12, 13 to a speed control circuit, not shown here, and from this is then passed on to the plug connections 7, 10 of the brush holders or the brushes.
  • FIG. 5-7 show the arrangement according to FIG. 3 after the plastic frame 4 has been injected or extrusion-coated.
  • anchoring holes 52, 53 are provided in the base body 5 or 8, as can be seen in FIG. 3 or 82, 83 stamped.
  • Axial mounting pins 43, 44 for axially attaching a brush pressure spring each are also molded onto the plastic frame 4.
  • axial fastening pins 41, 42 for fastening the plastic frame 4 to the inside of the end shield 1 of the commutator motor are injection molded with molded parts that can only be pulled in the axial direction and can be handled in the axial direction on the plastic frame 4. As can be seen in particular from FIG.
  • an axially open pocket 45 is arranged centrally between the connecting arm 6, 9 in a frame part also accommodating the plug connections combined into a central plug unit, into which the Hall transducer 22 provided as a scanning element can be axially inserted and with which Crosspieces 14, 15, 16 can be contacted.
  • FIG. 8 shows the complete, ready-to-use holder for the brushes of a commutator machine after the initially prepositioning auxiliary webs 21 have been separated.
  • U-shaped brush holders 51, 81 with protruding small tongues are inserted and caulked into slots 55, 85 of the base bodies 5, 8, which are stamped accordingly and can be seen in FIG. 7.
  • 271 of the brushes 26, 27 are contacted directly on the base bodies 5, 8, which in turn are connected in one piece to the plug connections 7, 10 via the connecting arms 6, 9.
  • Brush pressure springs 24, 25, which are plugged onto the axial mounting pins 43, 44, serve to press the brushes 26, 27 onto the commutator 1, which is only indicated.
  • FIG. 9-11 show detailed enlargements of the middle frame part of the plastic frame 4 in order to explain the mechanical mounting and electrical contacting of the Hall converter 22 with the further connection plugs 11-13 in more detail.
  • the Hall converter 22 is inserted into the axially open pocket 45 of the plastic frame 4, which has not yet been populated, with its connecting wire end 221 being able to be pushed axially through an opening and onto the connecting webs on the upper freely accessible connecting end 14-16 of the further plug connections 11-134 bendable and with these, for example in the soldering point 28 shown in FIG. 11 is electrically contactable.
  • the middle frame part, such as 7, corresponding insulating webs 46 running between the individual plug connections are also molded onto the plastic frame 4.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Bürstenhalterung für eine Kommutatormaschine gemäss Oberbegriff des Anspruchs 1; ein derartiges Verfahren ist aus der DE-A-2 709 520 bekannt.The invention relates to a method for producing a brush holder for a commutator machine according to the preamble of claim 1; such a method is known from DE-A-2 709 520.

Bei dem durch die DE-A-2 709 520 bekannten Verfahren werden beide -Bürstenkästen von einer einzigen Metallplatte aufgenommen, die mittig zwischen den einander gegenüberliegenden Bürstenkästen eine Bohrung aufweist, durch welche die Maschinenwelle bzw. der Kommutator in radialem Abstand durch- bzw. eingesteckt wird. Auf die obere und untere Breitseite dieser Metallplatte wird vor dem Austrennen der Trennstege je eine isolierende Kunststoff-Abdeckplatte aufgelegt, die Löcher aufweist, durch welche die Trennstege von aussen durchtrennt werden können. An mehreren über die einzige Metallplatte verteilt angeordneten Anschlussstellen sind weitere elektrische Bauteile aufsteckbar bzw. anlötbar.In the method known from DE-A-2 709 520, both brush boxes are received by a single metal plate which has a hole in the middle between the opposing brush boxes, through which the machine shaft or the commutator is inserted or inserted at a radial distance becomes. On the upper and lower broad side of this metal plate, an insulating plastic cover plate is placed on each of the separating webs, which has holes through which the separating webs can be severed from the outside. Further electrical components can be plugged or soldered onto a plurality of connection points distributed over the single metal plate.

Für einen Elektromotor mit einer elektronischen Schaltung zum belastungsunabhängigen Regulieren der Drehzahl ist es weiterhin bekannt (CH-A-568 679), zur Erfassung der jeweiligen Drehzahl als Signalgeber an dem einen Wellenende des Motors einen wenigstens zwei Magnetpole aufweisenden Dauermagneten zu befestigen und an der dem Wellenende gegenüberliegenden Seite auf einer dort am Motorstator gehaltenen Leiterplatte eine Spule mit wenigstens zwei die Dauermagnete axial übergreifenden und die Spule durchsetzenden Polschuhen vorzusehen.For an electric motor with an electronic circuit for load-independent regulation of the speed, it is also known (CH-A-568 679) to fasten a permanent magnet having at least two magnetic poles to the detection of the respective speed as a signal transmitter on the one shaft end of the motor and to the To provide a coil with at least two pole pieces axially overlapping the permanent magnets and penetrating the coil on a circuit board held there on the motor stator on the opposite side of the shaft end.

Gemäss Aufgabe vorliegender Erfindung soll eine kompakte und mit geringem Aufwand fertigbare Bürstenhalterung geschaffen werden, die auf einfache Weise elektrisch anschliessbar und mit weiteren elektrischen Bauteilen bestückbar ist.According to the object of the present invention, a compact brush holder which can be produced with little effort is to be created, which can be connected electrically in a simple manner and can be equipped with further electrical components.

Die Lösung dieser Aufgabe gelingt bei einem Verfahren zur Herstellung einer Bürstenhalterung für eine Kommutatormaschine der eingangs genannten Art durch die Lehre des Anspruchs 1; vorteilhafte Ausgestaltungen dieser Erfindung sind jeweils Gegenstand der Unteransprüche.This object is achieved in a method for producing a brush holder for a commutator machine of the type mentioned at the outset by the teaching of claim 1; advantageous embodiments of this invention are the subject of the dependent claims.

Die erfindungsgemässe Halterung für die Bürsten einer Kommutatormaschine erlaubt auf engstem Raum und mit nur wenigen fertigungs- und einfachen montagetechnischen Schritten die Positionierung und Kontaktierung der massgeblichen Bürstensystem-Funktionselemente, wobei sich der Kunststoff-Rahmen auf einfache Weise zur Halterung weiterer Funktionselemente, z.B. für ein Abtastelement der Rotordrehzahl mitverwenden lässt, wenn nach einer Ausgestaltung der Erfindung ein von einem Magnetring drehzahlabhängig berührungslos beeinflussbares Abtastelement, z.B. in Form eines Hall-Wandlers, in geringem radialen Abstand zu dem Magnetring in einer Tasche des Kunststoff-Rahmens gehaltert ist; die Tasche ist zweckmässigerweise zwischen den beiden Verbindungsarmen in einem Rahmenteil des Kunststoff-Rahmen angeordnet, der gleichzeitig weitere Steckanschlüsse aufnimmt, an denen äussere Anschlussleitungen zur Verbindung des Abtastelementes mit einer Drehzahlregelschaltung möglich sind, die ihrerseits dann wiederum mit den Steckanschlüssen der Bürsten verbunden ist.The holder according to the invention for the brushes of a commutator machine permits the positioning and contacting of the relevant brush system functional elements in the smallest space and with only a few manufacturing and simple assembly steps, the plastic frame being able to hold further functional elements, e.g. can be used for a scanning element of the rotor speed if, according to one embodiment of the invention, a scanning element that can be influenced by a magnetic ring in a contactless manner depending on the speed, e.g. in the form of a Hall converter, is held in a pocket of the plastic frame at a small radial distance from the magnetic ring; the bag is expediently arranged between the two connecting arms in a frame part of the plastic frame, which at the same time receives further plug connections, on which outer connecting lines for connecting the sensing element with a speed control circuit are possible, which in turn is then connected to the plug connections of the brushes.

Die Hilfsstege können auf besonders einfache Weise nach dem Erhärten der Kunststoff-Spritzmasse dadurch entfernt werden, dass die austrennbaren Hilfsstege ausserhalb des Kunststoff-Rahmens angeordnet sind. Nach einer weiteren Ausgestaltung der Erfindung sind in vorteilhafter Weise an den Kunststoff-Rahmen axial verlaufende Befestigungszapfen zur Befestigung des Kunststoff-Rahmens an der Innenseite eines Lagerschildes der Kommutatormaschine bzw. axiale Halterungszapfen zum axialen Aufstecken einer jeweiligen Bürstenandruckfeder für die Bürsten mitangespritzt.The auxiliary webs can be removed in a particularly simple manner after the plastic injection molding compound has hardened in that the removable auxiliary webs are arranged outside the plastic frame. According to a further embodiment of the invention, axially extending mounting pins for attaching the plastic frame to the inside of a bearing plate of the commutator machine or axial mounting pins for axially attaching a respective brush pressure spring for the brushes are also injection molded onto the plastic frame.

Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand eines schematisch dargestellten Ausführungsbeispiels in der Zeichnung näher erläutert. Darin zeigen:

  • Fig. 1 eine perspektivische Innenansicht eines Lagerschildes der Kommutatormaschine mit daran befestigter erfindungsgemäss ausgeführter Bürstenhalterung,
  • Fig. 2 in einem axialen Teil-Längsschnitt das kommutatorseitige Ende der Kommutatormaschine mit eingebauter erfindungsgemässer Bürstenhalterung,
  • Fig. 3 eine stirnseitige Ansicht zweier durch austrennbare Hilfsstege verbundener gestanzter einstückiger Metall-Bauteileinheiten vor dem Einspritzen in den Kunststoff-Rahmen,
  • Fig. 4 eine Draufsicht auf die Anordnung gemäss Fig. 3,
  • Fig. 5 die Konstruktion gemäss Fig. 3 nach dem Eingiessen bzw. Umgiessen des Kunststoff-Rahmens,
  • Fig. 6 eine Draufsicht auf die Anordnung gemäss Fig. 5,
  • Fig. 7 die Anordnung gemäss Fig. 5 in Rückansicht und mit zusätzlich eingesetztem Abtastelement für eine Drehzahlregelung,
  • Fig. 8 die betriebsfertige Anordnung gemäss Fig. 5 nach Austrennung der Hilfsstege und dem Einsatz der Kohlebürsten,
  • Fig. 9 bis 11 einen vergrösserten Detailausschnitt des Kunststoff-Rahmens im Bereich der Taschenaufnahme für das Abtastelement und dessen elektrische Kontaktierung.
The invention and further advantageous embodiments of the invention are explained in more detail below with reference to a schematically illustrated embodiment in the drawing. In it show:
  • 1 is a perspective interior view of a bearing plate of the commutator machine with a brush holder attached according to the invention,
  • 2 in an axial partial longitudinal section, the end of the commutator machine on the commutator side with a built-in brush holder according to the invention,
  • 3 shows an end view of two stamped, one-piece metal component units connected by removable auxiliary webs before being injected into the plastic frame,
  • 4 shows a top view of the arrangement according to FIG. 3,
  • 5 shows the construction according to FIG. 3 after the plastic frame has been poured or cast in,
  • 6 is a plan view of the arrangement according to FIG. 5,
  • 7 shows the arrangement according to FIG. 5 in a rear view and with an additional scanning element for a speed control,
  • 8 shows the ready-to-use arrangement according to FIG. 5 after removal of the auxiliary webs and the use of the carbon brushes,
  • 9 to 11 show an enlarged detail of the plastic frame in the area of the pocket receptacle for the scanning element and its electrical contact.

Fig. 1 zeigt die perspektivische Draufsicht auf die Innenseite des kommutatorseitigen Lagerschildes 1 eines in Fig. 2 in einem axialen Teil-Längsschnittbild _ dargestellten Kommutatormotors. Der Läufer des in Fig. 2 dargestellten Kommutatormotors trägt an seinem rechten Wellenende vor dem Wickelkopf 2 und dem Kommutator 3 einen in Kunststoff eingespritzten Magnetring 23. Der axiale Bereich des Kommutators 3 und des Magnetrings 23 wird gemäss Fig. 1 teilkreisförmig von einer Bürstenhalterung in Form eines Kunststoff-Rahmens 4 mit darin ein- bzw. angespritzten verschiedenen Funktionselementen berührungslos teilweise umgriffen.1 shows a perspective top view of the inside of the commutator-side bearing plate 1 of a commutator motor shown in FIG. 2 in an axial partial longitudinal sectional view. The rotor of the commutator motor shown in FIG. 2 carries on its right shaft end in front of the winding head 2 and the commutator 3 a magnetic ring 23 injected in plastic. The axial region of the commutator 3 and the magnetic ring 23 is shaped like a part of a circle by a brush holder in accordance with FIG of a plastic frame 4 with various functional elements injected or molded therein partially without contact.

Fig. 3 und Fig. 4 zeigen ein einstückig gestanztes Metallteil; dieses Metallteil besteht aus zwei Metall-Bauteileinheiten, von denen jede einen Bürstenkasten-Grundkörpers 5 bzw. 8 eines Kastenbürstenhalters, einen Steckanschluss 7 bzw. 10 für den Anschluss einer äusseren Anschlussleitung sowie einen den Steckanschluss 7 bzw. 10 mit dem Grundkörper 5 bzw. 8 mechanisch und elektrisch verbindenden Verbindungsarm 6 bzw. 9 enthält. Die beiden Metall-Bauteileinheiten 5, 6, 7 bzw. 8, 9, 10 sind über diese gegenseitig positionierende, austrennbare Hilfsstege 21 miteinander verbunden, derart dass die beiden betriebsmässig nicht direkt elektrisch kontaktierten Bauteileinheiten bereits in ihrer betriebsmässigen Zuordnung zusammenhängend einstückig ausgestanzt, jedoch nach dem anschliessenden Einspritzen in den u.a. aus Fig. 5 ersichtlichen Kunststoff-Rahmen 4 durch Abtrennen der Hilfsstege 21 wieder elektrisch getrennt sind.3 and 4 show a one-piece stamped metal part; this metal part consists of two metal component units, each of which is a brush box base body 5 or 8 of a box brush holder, a plug connection 7 or 10 for the Connection of an outer connecting line and a connecting arm 6 or 9 which mechanically and electrically connects the plug connection 7 or 10 to the base body 5 or 8. The two metal component units 5, 6, 7 and 8, 9, 10 are connected to one another via these mutually positioning, separable auxiliary webs 21, so that the two component units that are not directly electrically contacted during operation are already punched out integrally in their operational assignment, but after the subsequent injection into the plastic frame 4, which can be seen in FIG. 5, among other things, are electrically separated again by separating the auxiliary webs 21.

In gleicher Reihe wie die Steckanschlüsse 7, 10 sind weitere Steckanschlüsse 11, 12, 13 im Sinne einer von einem Zentralstecker kontaktierbaren Steckereinheit mitausgestanzt und durch später nach der Kunststoffeinbettung austrennbare Hilfsstege 21 in ihrer betriebsmässigen Zuordnung gegeneinander vorpositioniert. An den oberen Enden der weiteren Steckanschlüsse 11, 12, 13 sind Anschlussstege 14, 15, 16 für ein weiters, von dem Kunststoff-Rahmen 4 gehaltertes Bauteil vorgesehen, für das beim vorliegenden Ausführungsbeispiel durch ein Abtastelement in Form eines in Fig. 7 bzw. Fig. 11 eingezeichneten Hall-Wandlers 22 vorgesehen ist, in dem bei Drehung des Rotors des Kommutatormotors durch den Magnetring 23 berührungslos drehzahlproportionale Signale erzeugt werden, die über an die weiteren Steckanschlüsse 11, 12, 13 angeschlossene Leitungen an eine hier nicht dargestellte Drehzahlregelschaltung und von dieser dann an die Steckanschlüsse 7, 10 der Bürstenhalterungen bzw. der Bürsten weitergegeben werden.In the same row as the plug connections 7, 10, further plug connections 11, 12, 13 are also punched out in the sense of a plug unit that can be contacted by a central plug, and are prepositioned with respect to one another in terms of their operational assignment by auxiliary webs 21 that can later be removed after the plastic embedding. At the upper ends of the further plug connections 11, 12, 13, connecting webs 14, 15, 16 are provided for a further component held by the plastic frame 4, for which, in the present exemplary embodiment, a scanning element in the form of a Fig. 11 drawn Hall converter 22 is provided in which when the rotor of the commutator motor is rotated by the magnetic ring 23 contact-free speed-proportional signals are generated, which are connected to the further plug connections 11, 12, 13 to a speed control circuit, not shown here, and from this is then passed on to the plug connections 7, 10 of the brush holders or the brushes.

Fig. 5-7 zeigen die Anordnung gemäss Fig. 3 nach dem Ein- bzw. Umspritzen des Kunststoff-Rahmens 4. Zur zusätzlichen Verankerung angespritzter Kunststoffteile sind in den Grundkörper 5 bzw. 8, wie aus Fig. 3 ersichtlich, Verankerungslöcher 52, 53 bzw. 82, 83 eingestanzt. An den Kunststoff-Rahmen 4 sind weiterhin axiale Halterungszapfen 43, 44 zum axialen Aufstecken jeweils einer Bürstenandruckfeder angespritzt. In gleicher Weise sind mit nur in axialer Richtung zeihbaren Formteilen und in axialer Richtung handhabbarer Montage an den Kunststoff-Rahmen 4 axiale Befestigungszapen 41,42 zur Befestigung des Kunststoff-Rahmens 4 an der Innenseite des Lagerschildes 1 des Kommutatormotors angespritzt. Wie insbesondere aus Fig. 6 ersichtlich, ist mittig zwischen den Verbindungsarm 6, 9 in einem auch die zu einer zentralen Steckereinheit zusammengefassten Steckanschlüsse aufnehmenden Rahmenteil eine axial geöffnete Tasche 45 angeordnet, in die der als Abtastelement vorgesehene Hall-Wandler 22 axial einschiebbar und mit den Anschlussstegen 14, 15, 16 kontaktierbar ist.5-7 show the arrangement according to FIG. 3 after the plastic frame 4 has been injected or extrusion-coated. For additional anchoring of injection-molded plastic parts, anchoring holes 52, 53 are provided in the base body 5 or 8, as can be seen in FIG. 3 or 82, 83 stamped. Axial mounting pins 43, 44 for axially attaching a brush pressure spring each are also molded onto the plastic frame 4. In the same way, axial fastening pins 41, 42 for fastening the plastic frame 4 to the inside of the end shield 1 of the commutator motor are injection molded with molded parts that can only be pulled in the axial direction and can be handled in the axial direction on the plastic frame 4. As can be seen in particular from FIG. 6, an axially open pocket 45 is arranged centrally between the connecting arm 6, 9 in a frame part also accommodating the plug connections combined into a central plug unit, into which the Hall transducer 22 provided as a scanning element can be axially inserted and with which Crosspieces 14, 15, 16 can be contacted.

Fig. 8 zeigt die komplette betriebsfertige Halterung für die Bürsten einer Kommutatormaschine, nachdem die zunächst vorpositionierenden Hilfsstege 21 ausgetrennt sind. Zur Bürstenführung sind U-förmige Bürstenköcher 51, 81 mit vorstehenden kleinen Zungen in entsprechend eingestanzte, in Fig. 7 ersichtliche, Schlitze 55, 85 der Grundkörper 5, 8 eingesteckt und verstemmt. Die Stromleitungslitzen 261; 271 der Bürsten 26, 27 sind, wie aus Fig. 8 ersichtlich, direkt an den Grundkörpern 5, 8 kontaktiert, die ihrerseits über die Verbindungsarme 6, 9 einstückig mit den Steckanschlüssen 7, 10 elektrisch verbunden sind. Zum Andruck der Bürsten 26, 27 auf den nur angedeuteten Kommutator 1 dienen auf die axialen Halterungszapfen 43, 44 aufgesteckte Bürstenandruckfedern 24, 25.FIG. 8 shows the complete, ready-to-use holder for the brushes of a commutator machine after the initially prepositioning auxiliary webs 21 have been separated. For brush guidance, U-shaped brush holders 51, 81 with protruding small tongues are inserted and caulked into slots 55, 85 of the base bodies 5, 8, which are stamped accordingly and can be seen in FIG. 7. The power line strands 261; As shown in FIG. 8, 271 of the brushes 26, 27 are contacted directly on the base bodies 5, 8, which in turn are connected in one piece to the plug connections 7, 10 via the connecting arms 6, 9. Brush pressure springs 24, 25, which are plugged onto the axial mounting pins 43, 44, serve to press the brushes 26, 27 onto the commutator 1, which is only indicated.

Fig. 9 - Fig. 11 zeigen in Detail-Vergrösserungen des mittleren Rahmenteils des Kunststoff-Rahmens 4, um die mechanische Halterung und elektrische Kontaktierung des Hall-Wandlers 22 mit den weiteren Anschlusssteckern 11-13 nähert zu erläutern. In die in Fig. 10 noch nicht bestückte axial geöffnete Tasche 45 des Kunststoff-Rahmens 4 wird gemäss Fig. 11 der Hall-Wandler 22 eingesteckt, wobei sein Anschlussdrahtende 221 axial durch eine Öffnung durchsteckbar und auf das obere frei zugängliche Anschlussende jeweils auf die Anschlussstege 14-16 der weiteren Steckanschlüsse 11-134 zubiegbar und mit diesen, z.B. in dem in Fig. 11 dargstellten Lötpunkt 28, elektrisch kontaktierbar ist. Um in vorteilhafter Weise einerseits die Steckanschlüsse 7, 10 bzw. 11-13 auf engstem Raum für eine zentrale Steckereinheit unterzubringen, andererseits jedoch auch hinreichende lsolations- bzw. Kriechstrecken zwischen den Steckanschlüssen gewährleisten zu können, sind im mittleren Rahmenteil, wie z.B. aus Fig. 7 ersichtlich, an den Kunststoff-Rahmen 4 entsprechende zwischen den einzelnen Steckanschlüssen verlaufende Isolationsstege 46 mitangespritzt.9-11 show detailed enlargements of the middle frame part of the plastic frame 4 in order to explain the mechanical mounting and electrical contacting of the Hall converter 22 with the further connection plugs 11-13 in more detail. In accordance with FIG. 11, the Hall converter 22 is inserted into the axially open pocket 45 of the plastic frame 4, which has not yet been populated, with its connecting wire end 221 being able to be pushed axially through an opening and onto the connecting webs on the upper freely accessible connecting end 14-16 of the further plug connections 11-134 bendable and with these, for example in the soldering point 28 shown in FIG. 11 is electrically contactable. In order to advantageously accommodate the plug connections 7, 10 and 11-13 on the one hand in the most confined space for a central plug unit, but on the other hand also to be able to ensure sufficient insulation or creepage distances between the plug connections, the middle frame part, such as 7, corresponding insulating webs 46 running between the individual plug connections are also molded onto the plastic frame 4.

Claims (9)

1. Method for manufacturing a brush holder for a commutating machine having a unit comprising a stamped metal component (5-10), which overlaps the commutator (3) or the machine shaft with radial clearance and which has at least one brush box base body (5, 8), a plug connection (7, 10) for an external J connection lead and a connecting piece (6, 9) between the base body and the plug connection and further parts which in operation are to be insulated electrically from one another, these parts being initially connected to one another for reciprocal positioning via auxiliary cross-pieces (21) stamped out with them, said cross-pieces being removed after the metal component has been inserted into a plastic covering, characterised in that where there are at least two metal components (5, 6, 7; 8, 9, 10) each of which has one brush box base body (5; 8) and one connecting arm (6; 9) to respective plug connections (7; 10), which connections are arranged in peripheral direction, as part of a central plug (7, 10; 11-13), between the brush box base bodies (5; 8) and which
are stamped out in the shape of a tongue, there are respective removable auxiliary cross-pieces (21; 17-20) on the one hand between the base bodies (5; 8) and on the other hand between the tongue-shaped plug connections (7; 10) of the brush box base bodies (5; 8) and further tongue-shaped central plug plug-in connections (11-13) which may be stamped out together in one piece and these auxiliary cross pieces (21; 17-20) may be removed after the two components (5, 6, 7; 8, 9, 10) have been injected into a plastic framework (4).
2. Method according to claim 1, characterised in that the removable auxiliary cross-pieces (21; 17-20) are disposed outside the plastic framework (4).
3. Method according to claim 1 or 2, characterised in that stamped out with the further plug connections (11-13) are connecting pieces (14-16) for further components mounted on the plastic framework (4) and electrically contactable via the connecting pieces (14-16).
4. Method according to one of claims 1 to 3, characterised in that a scanning element (Hall transducer 22) which may be influenced, in dependence on the speed, by a rotor speed transmitter (magnetic ring 23) is mounted with small radial clearance from the rotor speed transmitter in a pocket (45) of the plastic framework (4).
5. Method according to claim 4, characterised in that the free ends of the connecting pieces (14-16) and of the scanning element (22) are inserted into an axially accessible opening of the pocket (45) and are contacted there.
6. Method according to claim 4 or 5, characterised in that the pocket (45) is disposed between the two connecting arms (6 or 9) in a housing section of the plastic framework (4) which also accomo- dates the central plug.
7. Method according to one of claims 1 to 6, characterised in that injection moulded onto the plastic framework (4) are axial fixing pins (41,42) for the attachment of the plastic framework (4) to the inside of a bearing plate (1) of the commutating machine.
8. Method according to one of claims 1 to 7, characterised in that injection moulded onto the plastic framework (4) are axial mounting pins (43, 44) for the mounting of respective brush pressure springs (24,25).
EP85111381A 1984-09-19 1985-09-09 Process for the manufacture of a support for the brushes of a commutator machine Expired EP0175992B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3434407 1984-09-19
DE3434407 1984-09-19

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EP0175992A1 EP0175992A1 (en) 1986-04-02
EP0175992B1 true EP0175992B1 (en) 1988-05-11

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DE3716504A1 (en) * 1987-05-16 1988-12-01 Schunk Motorensysteme COAL HOLDER ARRANGEMENT
EP0304528A3 (en) * 1987-08-28 1989-07-26 Johnson Electric Industrial Manufactory Limited Brush assembly in an electric motor
JPH05115148A (en) * 1991-10-22 1993-05-07 Mabuchi Motor Co Ltd Small motor
DE59200128D1 (en) * 1992-02-15 1994-05-26 Siemens Ag Commutator motor, in particular for driving a washing machine, and method for its assembly.
TR28136A (en) * 1993-09-15 1996-01-30 Siemens Ag The collector motor is a single-speed, series-wound motor, especially for an automatic washing machine drive, with a speed-regulated speed.
DE19704472A1 (en) * 1997-02-06 1998-08-13 Bosch Gmbh Robert Electric motor
WO2000019584A1 (en) * 1998-09-29 2000-04-06 Siemens Aktiengesellschaft Brush holder for a commutator motor
US6909218B2 (en) 2003-02-26 2005-06-21 Black & Decker Inc. End cap and brush box assembly
ITPD20100012U1 (en) * 2010-03-01 2011-09-02 Nuova Sme S P A PERFORMED STRUCTURE OF ELECTRIC MOTOR, PARTICULARLY FOR GEARED MOTORS FOR LIFTS, SEATS, WIPERS, AND OTHER APPLICATIONS IN VEHICLES

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DE3562692D1 (en) 1988-06-16
EP0175992A1 (en) 1986-04-02

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